Improvement in spring eye-glasses



nird git/aire vLOUIS BLACK, 0F DETROIT, MICHIGAN.

` Letters Patent No. 95,872, dated October 19, 1869.

IMPROVEMENT IN SPRING- EYE-GLASSES.

The Schedule referred to in these Letters Patent and making part of the name.

To all/whom it may concern Be it known that I, LOUIS BLACK, of Detroit, in the county of Wayne, and State of Michigan, have invented a new and useful Improvementin'Spring Eye- Glasses; and Ido hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing. v

.'.lhis invention relates to improvements in connecting the springs to the eye-glass, having for its object to provide more durable connections of the springs to the saidframes, and which connections may be readily detached.

The invention consists in connecting the said springs to the said projections, by means of clamps, either provided with eccentric clamping-pawls, or provided with rivets, arranged to be tightened by Wedging against wedge-shaped projections, widest at the outer ends, toward which the clamps, when connected around the narrower parts, are drawn, .the ends ofthe springs in all cases being placed between the projections and the clamps, and provided with locking-devices, to prevent sliding out between the clamps and projections, all as hereinafter more fully specified.

Figure A1 represents a side View of a pair of springglasses, connected according to my improvement;

Figure 2 represents a longitudinal section through one of the said connections;

Figure 3 represents a similar section through the other connection;

lFigurel represents a section of another arrangement of the said connection; and

Figures 5 and 6 represent two diierent arrangements for the ends of the springs, to prevent themfrom sliding out of the clamps.

These springs are commonly connected to the eyeglass bows by rivets, which weaken both thesprings and the parts of the hows or frames through which the rivet-holes are made, and they are difficult to remove when required, which is frequently the case.

These objections I propose to obviate by clamping the springs to the said projections of the eye-glass bows, and this I propose to do by various arrangements of the clamping-devices, in respect of the dctails.

At A, figs. land 2, I make a clamp, c, which I pivotto the projection of the eye-glass frame at b, so as to oscillate to some extent, and having room between the top 0f the projection c and the wall of the top of the clamp, for the ready insertion of the end of the spring; also, having an eccentric pawl, d,

at the upper lower corner, arranged to work against the end of the projection, which is curved for the reception of the paw f The said pawl, when turned down into the position represented at A, figs. 1 and 2, clamps the spring and projection rigidly together.

The end of the spring may be bent down slightly, v with a corresponding recess vat the base of the projecltion c, as represented at c, as a further security against heilig drawn out.

At j; iig. 6, I have shown an extension of the end of the spring, so as to form a hook for engaging more permanently with the projection C, which is designed'v to be correspondingly recessed for the reception ofthe same, and at g, fig. 5, I have shown a-projection'nsing from the upper side of the spring, to engage behind the clamp, and formed by punching or indenting the spring from the under side.

I propose to make use of anyequivalent means for preventing the withdrawal of these springs.

At B, iig. 2, I have shown a clamp, b', not pivoted to the projection c', but arranged to slip over the outer end of the said projection, which is thicker at the said end, and to be secured by a rivet or pin, d', put in at'- cerl the clamp is slipped on, and passing under the said proj ection This clamp is tightened up by drawing it back toward the end of the projection, after the spring has been put in place, and the bent end engaged with the recess at the bottom of the projection. This arrangement is jclearly shown in section at iig. 3.

The modification shown at iig. 4 differs from the arrangement at A, figs. l and 2, only in the respect/that the projection c is considerably shortened, and the eccentric pawl d works down upon the spring.

The pawl d need not necessarily have an extension or handle, but will Work equally well if made as an eccentric rivet, except that it may not be turnedas readily.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. Connecting Athe-springs of spring eye-glasses to the eye-glass frame by clamps a b, when arranged to be secured by wedge-formed devices, or their equivalents, snbstantially as specified.

2. In combination with the said clamps-the bent projections at the ends of the springs, or their equivalents, substantially as specified. f v

LOUIS BLACK.

Witnesses NICHOLAS TIsLER, PETER GUENTHER. 

